Does the MCAT need to be completed before beginning the Medical School Application process?

When applying to undergraduate programs, most schools will allow you to apply before the deadline without sending in your SAT/ACT scores yet as long as you are registered and you will send the scores directly to them. Is this the same for medical school where you can finish the application process and send in MCAT scores at a slightly later date?

You must have your Mcat scores in hand before you apply for med school, it is different from SAT/ACT/IB. In addition, you should complete all your med school pre-reqs before take Mcat.